Folded SDL_WINDOW_FULLSCREEN_EXCLUSIVE and SDL_WINDOW_FULLSCREEN_DESKTOP into a single SDL_WINDOW_FULLSCREEN flag

The fullscreen video mode used by the window can be used to determine whether it's in exclusive fullscreen or fullscreen desktop mode.

test/testsensor.c

@@ -95,7 +95,7 @@ int main(int argc, char **argv)
         SDL_bool done = SDL_FALSE;
         SDL_Event event;
 
-        SDL_CreateWindow("Sensor Test", 0, 0, 0, 0, SDL_WINDOW_FULLSCREEN_DESKTOP);
+        SDL_CreateWindow("Sensor Test", 0, 0, 0, 0, SDL_WINDOW_FULLSCREEN);
         while (!done) {
             /* Update to get the current event state */
             SDL_PumpEvents();